my car runs good for five minutes then runs rough like its missing on one cylinder. So far ive checked compression, plug looks good, plug wire seem good. Cleaned maf sensor. I couldnt find the coolant temp. Sensor. Cleaning maf seemed to help better than anything but shortly after cleaning, it runs rough still once reaching temperature. Thanks.
Possibly a faulty coolant temp sensor, this is not the sender for the temp gauge, but a separate sensor that tells the ECU when engine is cold and then alters the mixture ratio for better cold running, this if faulty can cause erratic and poor hot idle.